Machining method of special-shaped part

Abstract

The invention provides a machining method of a special-shaped part. The machining method comprises the following steps that S1, material preparation and grinding are conducted, specifically, a blank material is ground into a fine polishing material with all faces in the standard integer size; s2, machining an electric discharge machining clearance hole; s3, first-time electric discharge machining is conducted, specifically, first-time electric discharge machining is conducted at the position of the electric discharge machining clearance hole, and a first electric discharge machining part is formed; s4, first-time NC machining is conducted, specifically, the fine polishing material is clamped, and three datum planes are machined and used for data obtaining and meter calibration; s5, second-time NC machining is conducted, specifically, second-time clamping and turn-over machining are conducted, and the formed part is provided with a face body of a second electric discharge machining part; s6, second-time electric discharge machining, wherein a second electric discharge machining part is formed; and S7, wire cutting forming: performing data acquisition and meter calibration through the reference surface of the fine polishing material and the reference surface of a wire cutting machine table, performing wire cutting blanking, and forming a part. The combined process is adopted for machining, the precise effect of five-axis numerical control machine table machining can be achieved through three-axis numerical control machine table equipment, and the process steps are simple and easy to achieve.

Description

Technical Field

[0001] The present invention relates to the technical field of part processing, and in particular to a processing method for special-shaped parts.

Background Art

[0002] Recently, a batch of products were injection-molded in the workshop. These products need to be molded with the participation of assembled inserts. One of the insert parts 1 in the assembled inserts has a relatively complex and irregular shape structure. Figure 1 The structural schematic diagram of the part 1 at an angle is shown. Figure 2 The structural schematic diagram of the part 1 at another angle is shown. The part 1 has a first electrical discharge machining part 10 and a second electrical discharge machining part 11. At present, the machining of the part 1 requires multiple turning milling, electrical discharge machining and a combination of various processes to complete the dimensional forming, and a five-axis CNC machine tool is required to achieve the precise machining effect of the part 1. In this way, not only the performance requirements for the machining machine tool are relatively high, but also it is time-consuming and laborious.

[0003] In view of this, the present invention provides a processing method for special-shaped parts to solve the above technical problems.

Summary of the Invention

[0004] In order to solve the problem that when machining special-shaped parts with irregular shapes, it is often necessary to perform multiple turning milling, electrical discharge machining and a combination of various processes, and a five-axis CNC machine tool is required for machining to achieve the machining effect, with relatively high performance requirements for the machining machine tool and being time-consuming and laborious, for this reason, the present invention provides a processing method for special-shaped parts to solve the above problems.

[0005] The solution of the present invention to solve its technical problems is: a processing method for special-shaped parts, including the following steps:

[0006] S1: Stock preparation and grinding: Prepare a blank material. The size of the blank material needs to be larger than the size of the part to provide surplus material for processing and facilitate multiple turning and clamping operations during processing. Grind the blank material into a finished material with standard integer dimensions on each surface to facilitate clamping and data acquisition and calibration in each process section;

[0007] S2: Machining electrical discharge machining clearance holes: Drill electrical discharge machining clearance holes in the finished material obtained in S1;

[0008] S3: First electrical discharge machining: Use a first electrode to perform first electrical discharge machining at the electrical discharge machining clearance holes of the finished material obtained in S2 to form the first electrical discharge machining part of the part;

[0009] S4: First NC (numerical control) machining: Clamp the finished material obtained in S3 and machine three mutually perpendicular reference planes for subsequent process data acquisition and table calibration;

[0010] S5: Second NC (Numerical Control) Machining: Re-clamp the finish-machined blank obtained in S4, turn it over, and machine the one-sided shape of the part with the second electrical discharge machining section by milling;

[0011] S6: Second Electrical Discharge Machining: Use the second electrode to perform second electrical discharge machining on the finish-machined blank obtained in S5 to form the second electrical discharge machining section;

[0012] S7: Wire Cutting and Forming: Align and calibrate the finish-machined blank obtained in S6 with the reference plane of the wire cutting machine table through the reference plane of the finish-machined blank, perform wire cutting blanking, and form the part.

[0013] Preferably, in S1, the length, width, and height of the blank size should be greater than the length, width, and height of the corresponding part size by 20 mm.

[0014] Preferably, in S4 and S5, a three-axis numerical control machine tool can be selected to clamp and machine the finish-machined blank.

[0015] The beneficial effect of the present invention is that the processing method of a special-shaped part of the present invention adopts a combined process for processing. By constructing and machining the reference plane of the finish-machined blank, it is convenient for subsequent processes to take data and calibrate the table, so that the effect of five-axis numerical control machine tool processing can be achieved by using three-axis numerical control machine tool equipment. The processing process steps are simple and easy to implement, and the processing accuracy is high.

Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a conventional part at an angle.

[0017] Figure 2 is a schematic structural diagram of a conventional part at another angle.

[0018] Figure 3 is a process flow chart of the processing method of a special-shaped part of the present invention.

Detailed Embodiment

[0019] To further elaborate on the technical means and effects adopted by the present invention, the following is a detailed description in combination with the embodiments and drawings of the present invention.

[0020] The present invention provides a processing method for special-shaped parts, which is used to process and form a sub-part 1 with a relatively irregular shape. The part 1 includes a first electrical discharge machining section 10 and a second electrical discharge machining section 11. The processing method for the special-shaped part includes the following steps:

[0021] S1: Stock Preparation and Grinding: Prepare a blank. The size of the blank should be larger than the size of part 1 to provide surplus material for processing and facilitate multiple turning and clamping operations during processing. Grind the blank into a finish-machined blank with standard integer dimensions on each surface to facilitate clamping and data taking and calibration in each process section;

[0022] S2: Machining the spark machining clearance hole: Drilling the spark machining clearance hole in the finish-machined blank obtained in S1;

[0023] S3: First spark machining: Performing the first spark machining at the spark machining clearance hole of the finish-machined blank obtained in S2 using the first electrode to form the first spark machining part 10 of the formed part 1;

[0024] S4: First NC (numerical control) machining: Clamping the finish-machined blank obtained in S3 and machining three mutually perpendicular datum planes for subsequent process data extraction and table calibration;

[0025] S5: Second NC (numerical control) machining: Re-clamping and turning over the finish-machined blank obtained in S4 and milling the one-sided shape of the formed part 1 with the second spark machining part 11;

[0026] S6: Second spark machining: Performing the second spark machining on the finish-machined blank obtained in S5 using the second electrode to form the second spark machining part 11;

[0027] S7: Wire cutting and forming: Taking data and calibrating the finish-machined blank obtained in S6 with the wire cutting machine table datum plane through the datum plane of the finish-machined blank, performing wire cutting blanking to form the formed part 1.

[0028] Among them, the length, width, and height of the blank size in S1 need to be 20 mm greater than the corresponding length, width, and height of the formed part 1.

[0029] Among them, a three-axis numerical control machine tool can be selected in S4 and S5 to clamp and machine the finish-machined blank.

[0030] The beneficial effect of the present invention is that the processing method of a special-shaped part of the present invention adopts a combined process for processing. By constructing and machining the datum plane for the finish-machined blank, it is convenient for subsequent process data extraction and table calibration, so that the effect of five-axis numerical control machine tool processing can be achieved by using three-axis numerical control machine tool equipment. The processing process steps are simple and easy to implement, and the processing accuracy is high.

[0031] It should be noted that the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes, and modifications made by any person skilled in the art based on the technical solution of the present invention to the above embodiments all fall within the protection scope of the present invention.

Claims

1. A processing method for a special-shaped part, characterized in that, It includes the following steps: S1: Stock preparation and grinding: Prepare a blank. The size of the blank should be larger than that of the part to provide surplus material for processing and facilitate multiple face-turning clamping operations during processing. Grind the blank into a finished blank with standard integer dimensions on all faces to facilitate clamping and data acquisition and calibration in each process section; S2: Machining the spark machining clearance hole: Drill a spark machining clearance hole in the finished blank obtained in S1; S3: First spark machining: Use the first electrode to perform the first spark machining at the spark machining clearance hole of the finished blank obtained in S2 to form the first spark machining part of the part; S4: First NC (numerical control) machining: Clamp the finished blank obtained in S3 and machine three mutually perpendicular datum planes for data acquisition and calibration in subsequent processes; S5: Second NC (numerical control) machining: Re-clamp and turn over the finished blank obtained in S4 for machining, and mill and form the one-sided shape of the part with the second spark machining part; S6: Second spark machining: Use the second electrode to perform the second spark machining on the finished blank obtained in S5 to form the second spark machining part; S7: Wire cutting and forming: Align the finished blank obtained in S6 with the wire cutting machine table datum plane through the datum plane of the finished blank for data acquisition and calibration, perform wire cutting and blanking to form the part.

2. The processing method for a special-shaped part according to claim 1, characterized in that: In S1, the length, width, and height of the blank size should be 20 mm larger than the corresponding length, width, and height of the part.

3. The processing method for a special-shaped part according to claim 1, characterized in that: In S4 and S5, a three-axis numerical control machine tool can be selected to clamp and machine the finished blank.

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